Hypodermic syringe.



JUSTIN DE .L'ISLE, OF NEW YORK, N. Y.

HYPODEFKIVIIC SYRINGE.

Specification of Letters Patent.

Patented Jan. 22, 1907.

Application filed March 16, 1906. Serial No. 306,423.

To L7/Z whom/ t may concern:

Be it known that I, JUSTIN DE LisLE, a citizen of the United States, and a resident of the city of New York, borough of Manhattan,

in the county and State of New York, have invented a new and Improved Hypodermic Syringe, of which the following is a full, clear, and exact description.

The invention relates to hypodermic syrio inges, such as shown and described in Letters Patent of the United States No. 791,802, granted to me June 6, 1905.

The object of the present invention is to provide a new and improved hypodermic I 5 syringe arranged to contain antitoxin serum in an absolutely aseptic condition during the time the syringe is stored or in transit and to enable the user to readily rearrange the parts to allow a free unobstructed iiow of the 2o serum through the needle when the syringe is used. y

The invention consists of novel features and parts and combinations of the saine, which will be more fully described herein- 2 5 after and then pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings, forming a part of this specification, in which similar characters of reference indi- 3o cate corresponding parts in all the views.

Figure 1 is a sectional side elevation of the improvement, showing the parts assembled and the serum sealed against deleterious and contaminating influences. Fig. 2 is an en- 3 5 larged side elevation of the improvement, showing the parts in position for making a hypoderinic injection. Fig. 3 is a face. view -of the piston in the seruin-retainer. Fig. 4 is a plan view of the cap for engagement with 4c the piston, and Fig. 5 is an enlarged side elevation of a modified form of the improvement.

The container A for the serum or a like charge B is in the form of a barrel, open at 4 5 one end and provided at its other end with a discharge-nozzle C, having an eXteriorlyscrew-threaded lining C', on which screws the base end D of the needle D, the said discharge-nozzle C being .normally sealed or closed, either by providing the dischargenozzle with a breakable closing-point C2, as indicated in Fig. 1, or by providing a closingcap C3, screwed on the threaded reduced portion C4 of the lining C, as plainly-indicated in Fig. 5.

The base' end D ofthe needle D is provided with a stopper F, adapted to close the open end of the cap G, containing the outer portion of the needle D, as plainly shown in Fig. 1, so that the needle D is readily kept in an asep- 6o tic condition. The cap G is provided with a contracted portion G, forming a stop for the stopper F., and the outer end on top of the cap is provided with lugs G2, adapted to engage recesses H, formed in the outer face of the piston H, `fitted in the outer end of the container A for confining the serum or a charge B therein, it being understood that the cap G serves as a piston-rod to push the piston H in an inward direction in the con- 7o Vtainer A whenever it is desired to use the syringe for making hypodermic injections, as illustrated in Fig. 2. The piston H is preferably made of rubber or the like, and its outer face is preferably reinforced by a mel tallic plate H2.

From the foregoing it will be seen that the serum or other charge B contained in the container A is held against contaminating influences, as one end of the container A is 8o closed by the piston H and its dischargenozzle C is sealed either by the integral point C2 or by the cap C3, as shown in Figs. 1 and 5. It will also be noticed that as the cap G is closed by the stopper -F and contains the 8 5 needle D the latter is kept free from contaminating iniiuences, it being understood that the several parts are properly sterilized before being assembled, so as to keep the parts in a proper aseptic condition during 9o the time the syringe is stored or in transit.

When it is desired to use the hypodermic syringe for making an injection, it is onlyl necessary for the operator to unscrew the discharge-nozzle C from the base end D of the 9 5 needle D, aft-er which the discharge-nozzle C is opened either by breaking the point C2 thereof or removing the capC, and then the discharge-nozzle is again screwed onto the base end D of the needle D. rFhe cap G is then removed from the stopper F and inserted in the outer open end of the container A to engage the lugs G2 with the recesses H. The operator by now giving a slight turn to the cap D causes a turning and loosening of the piston H, and when this has been done and the point of the needle D has been inserted under the skin in the usual manner then the operator pushes the piston H inward by means of the cap G, so that the IOO IIO

serum is forced through the discharge-nozzle C and the needle D under the skin of the patient. After the syringe has been used for the purpose described it can be thrown away, as its cost is comparatively small,

'From the foregoing it will be seen that the needle and the serum are fully protected against contaminating and deleterious influences, and the operator in order to use the syringe for making a hypodermic injection has but few acts to perform and which acts do not require the operator to touch or handle the needle or permit air to have access to the serum for any length of time, as the serum is immediately used after theparts are reassembled. Thus the serum and all the parts of the syringe remain aseptic from the time of filling the container with serum and inclosing the needle in the sterilized cap G until the serum is injected under the skin.

Having thus described my invention, I claim asnew and desire to secure by Letters PatentH l. A hypodermic syringe, comprisingr a barrel provided with a discharge-nozzle normally sealed, a piston in the barrel for confining serum in the barrel and for forcing the serum out of it and through the said nozzle when opened, a cap, and a needle, provided with a base engaged by the said. nozzle and closing the end of the said cap, the latter inclosing the noodle and forming a means for pushing the piston in the barrel for the discharge of the serum from the barrel and through the needle.

2. A hypodermic syringe, comprising a barrel provided with a discharge-nozzle normally sealed and having screw-threads, a piston in the barrel f or confining serum therein and for forcing the serum out of the barrel and through the said nozzle when the latter is opened, a cap, and a needle screwing on the said threaded nozzle and provided with a base forming a stopper for the said cap, the latter inclosing the needle and forming a means for pushing the piston in the barrel for the discharge of the serum from the barrel and through the said nozzle and the needle.

3. A hypodermic syringe, comprising a barrel provided with a disch( rgenozzle normally sealed and having screwethreads, a pis-v ton in the barrel for confining serum therein and for forcing the serum out of the barrel and through the said nozzle when the latter is opened, a cap having means for engaging the said piston to turn the latter in the barrel, and a needle screwing on the said threaded nozzle and provided with a base forming a stopper for the said cap, the latter inclosing the needle and forming a means for pushing the piston in the barrel for the discharge of the serum from the barrel and through the said nozzle to the needle.

4. A hypodermic syringe7 comprising a barrel provided with a discharge-nozzle normally sealed and having screw-threads7 a pis ton in the barrel forconlining serum therein and 'l'orforcing the serum out of the barrel and. through the said nozzle when the latter is opened, .a cap having lugs at its outer end for engagement with recesses in the outer face of the said piston to turn' the latter in the barrel, and a needle screwing on the said threaded nozzle and provided with a base forming a stopper for the said cap, the latter inclosing the needle and forming a means for pushing the piston in the barrel for the discharge of the serum from the barrel and lthrough the said nozzle and the needle.

5. A hypodermic syringe7 comprising a ing a removable sealing-cap for normally sealing the nozzle, a piston in the barrel for confining serum in the barrel and for forcing the serum out of it and through the said nozzle when opened, a cap, and a needle, provided with a base engaged by the said nozzle and closing the end of the said cap, the latter inclosing the needle and forming a means for pushing the piston in the barrel for the discharge of the serum from the barrel and through the needle.

In testimony whereof I have signed my name to this specification in the presence ol' two subscribing witnesses.

JUSTIN DE LISLE.

Iitnesses THEO. G. HosTER, EVERARD B. MARsHALL.

barrel provided with a discharge-nozzle, hav- 

